Hydraulic motor head lift



1943- w. H. BERETISH 2,327,008

HYDRAULIC MOTOR HEAD LIFT Filed Sept. 17, 1941 3 Sheets-Sheet l llml fizz/6102M Z, M'Zk'am ficz ere Z2555 Aug. 17, 1943.

w. H. BERETISH 2,32 7,008

HYDRAULIC MOTOR HEAD LIFT Filed Sept. 17, 1941 3 Sheets-Sheet '3 llllllll! I ,Another a motor head lift which is hydraulically operated.

Patented Aug. 17, 1943 UNITED A? S ATE s PATENT OFFICE nYnRAULroMoTon HEAD LIFT' .l

William HQBeretish, Chicago, Ill., assignor to Stewart-Warner:Corporation, ,Chicago, 111;, a

corporation of Virginia.

Application September 1 7,1941, Serial No. 411,108

8 Claims. (01. 29-84) My invention relates to hydraulic motor head lifts adapted for raising the removable head of an internal combustion engine, or for other similar purposes. I I I The modern internal combustion engine usually has a removable head which issecured to the mo- I tor block by a multiplicity of studs screwed into the block and extending through openings in the head. These heads are commonly made of aluminum and frequently become so bonded to the pro- I jectingstuds of the motor block that great force is necessary to remove the head and sometimes, by present methods, it is even necessary to destroy the head in order to remove it.

Sometimes the studs attached to the motor block arev not exactly perpendicular to the ting phases of the head and block so that, a relatively large force is required to overcome, the frictional resistance between the head and studs, whether the'head be formed of aluminum, cast iron or other suitable material.

At present, there areno' adequate tools for lifting, without hinges, motor heads which are diiiicult to remove from motor blocks andanobject of my invention is to provide such a tool.

Another object of my invention is to provide a tool which maybe operated by the lubricant'compressors forming part of the ordinary equipment of every garage and service station. Another ob ect of my 'invention is to provide a motor head lift which can be readily operated by one hand and which will fit into very close quarters. j j, I I o I Another object of my invention is to provide a motor head liftwhich will. produce a liftin force of several tons with a very slight manual object of my invention to provide Another object of my invention is to provide a motor head lift which can be either manually or power operated.

Another object of my. invention is to. provide a motor head lift which may be made of a few.

relatively simple and inexpensive parts.

Another object of my invention is to provide a motor head lift which may be readily applied to motors of different sizes and designs.

Other objects and advantages will become apparent as the description proceeds. In the drawings: I I Fig.1 is a perspective view' of a preferredembodiment of my invention applied to a motor tor head lift shown in Fig. 1;

taching clip; and Fig.' -7 is a fragmentary view showing a modification of Fig. 3.

Referring particularly to Figs. 1 and 2 of the drawings, it will be seen that I have provided a hydraulicmotor head lift. comprising in general a base In mounted on three legs [2 and carrying a cylinder 14. Each leg l2' consists of a'pair of telescopingmembers I6 and I8 having knurled manual gripping surfaces 20 and 22, respectively. The telescopic portions l6 and I8 are threadedly connected asindicated at 24, whereby rotation of one section with respect to the other will lengthenor shorten the leg, there being suflicient friction between the threads to retain the two portions of the leg inadjusted position.

-The upper section I B of, each leg is provided with an annular groove 26; (Fig. 5) for receiving the bifurcated end 28 (Fig. 6) of a sprin clip 30 which serves to secure the upper end of the le to the base it while my hydraulic lift is in operative position.

The lower end 32 of the lower portion [8 of each leg preferably has a diameter' the same as or less than the diameterof the studs 34 which normally hold the motor head 38 in place on the motor block 38. As best shown in Fig. 4, I preferably place a sleeve 40 over each of the three studs 34 selected to support my hydraulic lift. These sleeves are of such length as to maintain alignment between the lower ends 32 of the legs and the studs 34 on which they are supportedso that the motor head, as it is lifted, may move upwardly aboutthe lower ends 32 of the legs 12.5Each sleeve Jig provided with a C-shaped spring 4| which frictionally gripsits leg [2 to prevent the sleeve from slipping off or otherwise becoming accidentally displaced from its leg. ,7

Referring particularly to Fig. 2, it will be seen that the cylinder I 4 comprises a sleeve 42 I threadedlysecured to a head 44 which, in turn,

isthreadedly attached to the ba sei to, A piston 46 is reciprocally mounted in the cylinder [4 and is provided with a piston rod 48 extending downwardly through the head 44 and base iii. The head 44 has a recess in which is located packing 5!] pressed firmly against the piston rod by nut 52.

The piston is provided with a manually cperated release valve indicated generally by reference numeral 5| and comprising a body 53 threaded into the upper end of the piston rod 44 and having a passage communicatin with a similar passage 51 in the upper end of the rod 42. The passages 55 and 5! constitute a by-pass around the piston 45 and this by-pass i con'-. trolled by the manually operated Valve member A spacing washer BI is clamped between the 59. piston 46 and a shoulder in the :rod 48 and prevents the piston and rod from beingrpull'eddown far enough to close the lower end of the passage 5'1. I

A block 54 is pivotally attachedto thelowerend of th piston rod 48 by a removable pin 56. 1 preferably attach this pin 56 to the block by a chain 58 to prevent loss of the pin. The block 54 ha an opening for receiving a .draw bar 60 which may be removably secured in the 'blo'cktfi by manually operated clampBZ '(Fig. 1).

A pair of heads 64 is slidable'lengthwise of the bar 60 and may be securedin adjusted position by clamps 65 which are similar't'o the clamp (32.

Each head 64 has a threaded nipple '6! "for receiving one end of a spark plug "adaptor I58. The lower 'end'of'each adap't'or'fia-has'a thrcaded lower end '50 of a size suit'ablefor screwing'intothe spark plug openings in the motor head. The adaptors 68 are preferably given a hexagonal shape and made of such length that they extend wellabove the motor head in order that they'm'ay'be'screwed into and out of the sparlzplug'openings bythe usual wrenches. Inuse, 1o spark plug adaptors with the heads 64 attached thereto are first screwed firmly into the spari: plug'openings. The heads 84 are-then adjustedto align th -openings therein withthe opening in block '54sothat-the bar Gilcanbe inserted.

Fluid is admitted to the'cylin'der ll-beneath-the piston 46 through a-pipe "lz-threade'cl 'or otherwise attached to the cylinder. --In the embodiment shown, a nipple -T4 of a kind-nowcommonly used pressed valve member is set to-rais'e from its seat 3 whenever the pressure'in the cylinder 14 reaches the predetermined maximum for which the pressure release valve is set.

The piston 46 may be raised bygas liquidyor semi-liquid medium, although I have .found .it:

preferable to raise this piston by-meansofgrease or oil supplied by the usual-lubricant compressor forming partcf theequipment of "every service station and garage. In Fig. 1, I havedllustra'ted a manually operated compressor BO ofLaliind-comnionly used in -the lubrication or bearing-s. This compressor comprises a reservoir and 'pumping mechanism whereby' 'grease from the reservoir is discharged through a conduit '82 to a nozzle or coupler 84 which maybe detachably conneeted'to the nipple 14 while the compressor is operated to force the grease into the cylinder and raise the piston 46 and the motor head connected thereto. After the head has been raised sufiiciently, the compressor 80 may be readily detached from the nipple 14.

In lieu of the manually operated compressor 38, .a power operated-lubricant compressor'or air com pressor, or any other source of :gas,.liquid, or semiliquid, either manually or power operated, may be used. In operating high motor head lifts, however, I have found it important that the piston-46 be raised in small increments and where sources .of fiuidgpressure other than the manually -.operated Uomprossor 80 are utilized, care must Ibe 'exercisedtto prevent the piston 46 from being raised too great a distance at any one movement.

In removing a motor head from the cylinder block my motor head lift is preferably applied to one end of the head. In a preferred form oi my invention, the piston 45 is given a diameter of three 'innh'esso that the piston 'will be lifted approximately one-thirty'seventh of an inch for each stroke of the handle of a lubricant compressor -oi.' the type indicated in Pig. 1 of the drawings. Such compressors are made to provide different maximum lubricant pressures, but all of thesecompressors-are capa'ble of develop ing 'at least 1,200 pounds per square inch of lubricant pressure and this multiplied by the "area of=a three inch piston will give a-total-lift- 'ing -force of "7,800, or approximately -'four tons. I have Sfoun'd that this force is adequate and .in this particular'enibodimont of my invention the pressure release valve fi has been set toopen at 1,200 pounds pepsquar'e inch fluid pressure.

On the first i stroke of the lubricant compres sure which is effective to .raise the piston 47:, there will .be :asslight bond in :the draw bar 60 -where the head is particularly difficult .to .re-

; parts, because the pressure release valve will relieve thelubricant pressure before .a dangerous point is reached.

The motor head should not be lifted more than one-sixteenth of an inch with the tool in "oneposition. Starting "at one "end "of the motor 'headthetool should besuccessively shiftedfrom end to end of the motor head until the motor head has been completely separated from the 'motor blook and has '=been lifted sumcientiy so that itmayv bereadily removed by han'd.

While Lhave described the procedure whiehis followed in removing a motonheadzwhereconly a rsinglemotor .iheadlift 'is :utilized, .it iis to be understood that under some conditions it may be desirabletoapply-two tools-atthe sametime to opposite ends of themotonhead. One man .can remove the head of the .motoininboth instances.

In the modification OT 'Fig '3,'I'have shown an embodiment of my invention'which Incorporates a fluid reservoir and-manualhroperated-mzmp or compressor as a unitary part'of the'hydraulic 'liit. '-In =this embodiment or any in-ventio'n, I provide a base l M adapted to be supported on legs such as the legs I2 of the previous embodiment. A cylinder II2 is'threadedly secured to the base III] and carries a cap II4 which closes the upper end of the cylinder. A piston IIIi is reciprocally mounted in-the cylinder. II2 and is adapted to be raised bya fluid forced therebeneath by pumping mechanism carried by the cap H4. The piston H6 is returned by a spring The piston I16 is provided with. a piston rod i20 extending through an opening of the base III), Packing I22 pressed against the rod I23 by gland nut I24 prevents leakagearound the piston rod." The piston rod I20 is illustrated as having its lower end threaded, as indicated at I26 so that the piston rod maybe screwed directly into the spark plug opening 01' a motor head. This arrangement, however, is less. desirable than the adjustable draw bar. type of connections between the piston rod 48 of the previous embodiment and. the spark 'plug openings of the motor head, and it will be understood that the piston rod I20 may-be provided with a simisponds to the piston rod I20 of Fig. 3 and has attached thereto the block 54 for receiving the draw bar 60. I v r The cylinder H2 is adapted to be filled with water, oil,'or other suitable liquid which is circulated by the pumpingmechanism carried by the cap II4. This pumping mechanism comprises a plunger I28 reciprocal in a vertical bore in the cap H4 and operated by a handle I30 pivotally attached to the plunger I28, and also i pivoted to the upper end of a link I32 whose lower end is pivoted to the cap H4, as indicated at I34. Packing I36 and gland nut I30 prevent leakage around the plunger I28.

Upward movement of the handle Iiiil'and plunger I28 serves to withdraw liquid from the upper end of the cylinder Ii2 through conduit I40 past check valve into the lower end of the cylinder bore I44. The following downward movement of the handle and plunger forces this fluid past check valve I46 and through duct I48 to the space beneath the piston II6,thereby raising the piston and the motor head attached thereto. Reciprocation of the handle I30 is con-' tinued until the motor head has been elevated the desired amount. As in the previous embodiment, the hydraulic lift is shifted from end to end of the motor head during the complete operation of removing the head from the cylinder block.

The fluid beneath the piston. I25 is returned to the upper part of the cylinder I I2 by manually opening the valve I50 controlling the bypass port I52. The valve I50 has a threaded stem mounted in a removal plug I54 and this valve has a sealing part I56 which is reciprocably mounted on a threaded stem and which is urged into sealing engagement with the walls of the by-pass I52 by a spring I58, whereby this valve constitutes a pressure release for relieving pressure beneath the piston II6 when this pressure reaches a predetermined maximum.

During the pumping operation which raises the piston I I6, air is compressed in the cylinder above this piston and I have illustrated an air release valve I60 comprising a pin I62 normally urged by a spring I64 into sealing engagement with a shoulder I66 in a passageway I65 in the head H4. The spring I60 rests against a sleeve II threaded into the upper end of the passage and the pin I62'is provided with a button II2 which may be manually lifted to raise the pin I62 from its seatu When the pin I62 is raised from its seat either by 'manipulation My invention'is adaptable without change to motorshaving various spacings of studs and various spacings of spark plug openings in the motor head. My invention can be readily adapted to lar draw bar type of connection. This is shown in Fig. 7, wherein, the piston rod I20 corre- I motors having different diameter studs by using legs having different diameter lower ends, or by simply substituting other lower sections I8 in the individual legs. I p

- Similarly, different adaptors 68 may be used to accommodate spark plug openings of different sizes. Where the lower end of the piston rod is screwed directly into the spark plug opening, as in Fig. '3, an adaptor may be be interposed between the piston rod and spark plugfopening to accommodate different sized openings.

The reservoir type of pumpof Figs; 3 and '2 is more expensive but is cleaner and quicker to 0perate than'the embodiment of Figs. 1 and 2, since in the latter embodiment it is necessary to empty the cylinder of grease aftereach use and to, .dis-

poseof such grease. o r

While I have illustrated only two embodiments of my invention, it will be understood that my invention may assume numerous forms ancl'that the scope of my invention is definedby the following claims:

I claim:

1. A motor head lift comprising a base, means for supporting said base from a motor block, said base having a flange and said means including a plurality of legs and a spring clip for each leg adjustably engaging said flange, a member attachable to a motor head, and means'mounted on said base for lifting said last-named member and a motor head attached thereto.

2. A motor head lift comprising a base having.

a circular flange, a plurality of supporting legs adapted to rest on studs attached to a motor block, spring means for detachably connecting said legs with said flange and to permit adjustment of said legs relative to said flange to accommodate diiiferent arrangements of studs, sleeves carried by said legs for telescoping over said studs, a rod adapted to be moved relative to said base. means on said base for moving said rod, a block pivotally and detachably connected to said rod, a crosshead slidable in said last-named and a member associated with each of said pulling heads for attaching the same ,to said motor head. 7

4. A motor head lift comprising a base, legs for supporting said base on studs attached to the motor block, a. plurality of pulling :heads adapted to be screwed into the spark plug-openings of a motor head, pulling means :mounted upon said base and including a pull rod, an elongated member extendingtransverseiy to said pull rodymeans mounting said members for bodily rotation on said pull rod'on an axis transverse thereto, and means slidably securing said pulling heads to said transversely extending member.

5. A motor head lift for removing :amotor head normallysecured to a motoriblook by studs, said lift comprising a base, legs for supporting said base on said studs, means loosely securing one end of each leg to said base, sleeves slidable'on the other end of each of said legs and adapted to telescope over said studs to align said legs and studs, means for preventing displacement of said sleeves from said legs, pulling heads attachable to said motor head, and pullingimeans mounted on said base and :connectedto-saidpulling heads to raise said pulling heads and-a motor head attached thereto.

6. In a .motor head lift, the combination of a base,;a plurality of legs'for supporting :said base on motor block studs, each leg comprising .a pair of relatively movableparts ;to.permit.lengthening and shortening, a sleeve adaptedto fitover each leg and its-adjacent stud for holding each leg in alignment .withits stud,.a U-shaped spring connected to each leg and adapted toclip on said base for detachably connectingeach leg withsaid base,;a power mechanism mounted on said base and provided with a ipoweroperated rod, awblock connected tosaid rod, 9. transverserod adjust- .ably mounted .in said block, a pair .of heads ad- ;iustable lengthwise of said transverse-rod, means for -.connecting :saidiheads with spark plug openingsnf a;motor:head,-,and means forcontrolling said power mechanism to raise said rod and motor head.

LA motor head lift comprising .a circular base, .legs ,for mounting said base on a .motor block,;a U-shapedspringadapted to clipon said base, said spring .having :a bifurcated .end for \detachably connecting the same ,to .a leg whereby saidspringimayconneot a leg with :said base at any :point :about .the periphery :thereof, pulling mechanism carried :by said base, means .ior conmeeting said :pulling mechanism with ;a motor head, and .meansiorroperatingzsaidpulling. mechanismito raise a motnr head attached thereto.

.8. .Amotorihead lift comprisinga base, 'legs for supporting said :base eon :studs .attached to the motor block, at :least oneof saidlegs comprising a pair of telescopic members :movable relative to eachother to vary-the lengthrof said leg,.a-.p1urality of pulling heads adapted to be screwed into the spark plug openings of a motor head, pulling means mounted upon said base and including-a pu-ll rod',-anelongated member-extending transverselyto said pull rod, means'mountmg said member for bodily-rotation on said pull rod on an axis '-transverse thereto, and means slidably-securing said pulling heads to-said transversely extending member.

' WILLIAM H. 

